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Strong coupling of excited heavy mesons

P. Colangelo, F. De Fazio, and G. Nardulli

N. Di Bartolomeo and R. Gatto

  • Dipartimento di Fisica, Universita di Bari, INFN, Sezione di Bari, Bari, Italy

  • Département de Physique Théorique, Université de Genève, Genève, Switzerland

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Phys. Rev. D 52, 6422 – Published 1 December, 1995

DOI: https://doi.org/10.1103/PhysRevD.52.6422

Abstract

We compute the strong coupling constant GB**Bπ (GD**Dπ), where B** (D**) is the 0+ P-wave bq¯ (cq¯) state, by QCD sum rules and by light-cone sum rules. The two methods give compatible results in the limit mQ→∞, with a rather large value of the coupling constant. We apply the results to the calculation of the hadronic widths of the positive parity B and D states and to the chiral loop contribution to the ratio fDs/fD.

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Phys. Rev. D 52, 6422– Published 1 December, 1995
  • Received 1 June 1995

© 1995 American Physical Society

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